> Product > Seismic Protection > LUD(Lock-Up Device)

Product Code BT-LUD Product name LUD
Tel No 82-31-295-7730 Fax No 82-31-295-7731
Email briteckorea@naver.com Date 2011-07-10

BRITEC Lock-Up Device (LUD) sometimes referred to as Shock Transmission Units (STU), create a rigid link at an otherwise moveable connection. During any sudden load, seismic, braking, train acceleration, ship collision or any other force acting on the bridge that would cause the bridge to move suddenly, the LUD becomes a rigid link and the forces are then transmitted through the structure. The concept is to share the load throughout all piers and abutments. By temporarily creating a rigid link where expansion and contraction normally occur, the bridge can be modeled as completely fixed. In continuous bridges the fixed pier no longer must resist the longitudinal forces as all other piers equipped with LUDs would be fixed during this loading condition. In accordance with AASHTO, all testing is done by independent laboratories to assure the performance of the device.